The vive tracker is easily mounted with a camera screw and is held tight in place.
The racket works perfect in "Eleven: Table Tennis" so i guess it should work in others too with the tracker support.
The handle needs to be printed twice and glued on with superglue.
The camera mount screw is 1/4 Inch one with 10mm long shaft, 5mm thread and 5mm without thread. (I used this one: https://www.amazon.de/gp/product/B00OOLKD3K )
If you have any suggestions for the design, feel free to post them here.